I would make an AA-12 with a modern, black and dark blue skin, kinda like the GR Runaways skin. I think it would be very cool to add something like an adorn to the weapon too, but I can't really think of any cool things. I think this weapon would really fit with Runaways and other characters + making a Kit with the DE-Camo and Jungle Knife.
This is mine and my friend's design for RAI Model 500 in an old event in Crossfire VN's official facebook group (i didn't know Haskins M500 is the another name of RAI Model 300 at that time), too bad VTC didn't accepted this with the reason : Only accept weapon already exist in Crossfire VN.
AK74M - DMZ Plutonium Shot - anAK-74 Variant that uses AK74M Model with Dual RPK74M style "Molot magazine" and it has AP Bullets (Special black Bullet shell) to Penetrate Zombies's strong frame in ZA mode and ZA3 Modes and a GP25 Grenade launcher that fires VOG25 in PVP modes but powerful as Wide Grenade-Gold Phoenix, while in PVE this will fire Depleted VOG25-P Uranium Rounds to deal massive damage and slows down against zombies every shot